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Oleg Nesterov 834d216e1f signalfd: fix interaction with posix-timers ... dequeue_signal: if (__SI_TIMER) { spin_unlock(&tsk->sighand->siglock); do_schedule_next_timer(info); spin_lock(&tsk->sighand->siglock); } Unless tsk == curent, this is absolutely unsafe: nothing prevents tsk from exiting. If signalfd was passed to another process, do_schedule_next_timer() is just wrong. Add yet another "tsk == current" check into dequeue_signal(). This patch fixes an oopsable bug, but breaks the scheduling of posix timers if the shared __SI_TIMER signal was fetched via signalfd attached to another sub-thread. Mostly fixed by the next patch. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Roland McGrath <roland@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		18 years ago
..
irq	free_irq(): fix DEBUG_SHIRQ handling	18 years ago
power	Hibernation: do not try to mark invalid PFNs as nosave	18 years ago
time	timer: remove clockevents_unregister_notifier	18 years ago
.gitignore	…
Kconfig.hz	…
Kconfig.preempt	[PATCH] sched: arch preempt notifier mechanism	18 years ago
Makefile	…
acct.c	Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().	18 years ago
audit.c	…
audit.h	…
auditfilter.c	[PATCH] allow audit filtering on bit & operations	18 years ago
auditsc.c	kernel/auditsc.c: fix an off-by-one	18 years ago
capability.c	…
compat.c	…
configs.c	…
cpu.c	…
cpuset.c	usermodehelper: Tidy up waiting	18 years ago
delayacct.c	…
die_notifier.c	…
dma.c	…
exec_domain.c	…
exit.c	Kill some obsolete sub-thread-ptrace stuff	18 years ago
extable.c	…
fork.c	mm: Remove slab destructors from kmem_cache_create().	18 years ago
futex.c	futex_unlock_pi() hurts my brain and may cause application deadlock	18 years ago
futex_compat.c	…
hrtimer.c	Cache xtime every call to update_wall_time	18 years ago
itimer.c	…
kallsyms.c	…
kexec.c	…
kfifo.c	…
kmod.c	kernel-doc fix for kmod.c	18 years ago
kprobes.c	fix compilation with gcc 4.2	18 years ago
ksysfs.c	FRV: Fix linkage problems	18 years ago
kthread.c	kthread: silence bogus section mismatch warning	18 years ago
latency.c	…
lockdep.c	lockdep debugging: give stacktrace for init_error	18 years ago
lockdep_internals.h	…
lockdep_proc.c	Fix leak on /proc/lockdep_stats	18 years ago
module.c	…
mutex-debug.c	…
mutex-debug.h	…
mutex.c	lockstat: measure lock bouncing	18 years ago
mutex.h	…
nsproxy.c	mm: Remove slab destructors from kmem_cache_create().	18 years ago
panic.c	…
params.c	modules: better error messages when modules fail to load due to a sysfs problem.	18 years ago
pid.c	…
posix-cpu-timers.c	…
posix-timers.c	posix-timers: fix creation race	18 years ago
printk.c	fix - ensure we don't use bootconsoles after init has been released	18 years ago
profile.c	fix compilation with gcc 4.2	18 years ago
ptrace.c	coredump masking: reimplementation of dumpable using two flags	18 years ago
rcupdate.c	…
rcutorture.c	…
relay.c	Fix a use after free bug in kernel->userspace relay file support	18 years ago
resource.c	…
rtmutex-debug.c	…
rtmutex-debug.h	…
rtmutex-tester.c	…
rtmutex.c	…
rtmutex.h	…
rtmutex_common.h	…
rwsem.c	lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex	18 years ago
sched.c	sched: run_rebalance_domains: s/SCHED_IDLE/CPU_IDLE/	18 years ago
sched_debug.c	sched debug: dont print kernel address in /proc/sched_debug	18 years ago
sched_fair.c	sched: fix sleeper bonus	18 years ago
sched_idletask.c	sched: remove the 'u64 now' parameter from ->put_prev_task()	18 years ago
sched_rt.c	sched: remove the 'u64 now' parameter from ->put_prev_task()	18 years ago
sched_stats.h	[PATCH] sched: add schedstat_set() API	18 years ago
seccomp.c	…
signal.c	signalfd: fix interaction with posix-timers	18 years ago
softirq.c	…
softlockup.c	…
spinlock.c	lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex	18 years ago
srcu.c	…
stacktrace.c	…
stop_machine.c	…
sys.c	Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION	18 years ago
sys_ni.c	…
sysctl.c	Remove double inclusion of linux/capability.h	18 years ago
taskstats.c	…
time.c	Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().	18 years ago
timer.c	Pull ia64-clocksource into release branch	18 years ago
tsacct.c	Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().	18 years ago
uid16.c	…
user.c	mm: Remove slab destructors from kmem_cache_create().	18 years ago
user_namespace.c	…
utsname.c	…
utsname_sysctl.c	…
wait.c	…
workqueue.c	…